Call Progress and "Voice" Detector
CMX683
4.
External Components
Typical Values:
C1
C2
X1
Note:
0.1µF ± 20%
0.1µF ± 20%
3.579545MHz (refer to Section 1.7.1)
C1 is not required if the input is referenced to VREF.
Figure 2 Recommended External Components
To achieve good noise performance, V
DD
decoupling and protection of the receive path from extraneous
in-band signals are very important. It is recommended that the printed circuit board is laid out with a
ground plane in the CMX683 area to provide a low impedance connection between the V
SS
pin and the
V
DD
decoupling capacitor.
©
2002 CML Microsystems Plc
5
D/683/1
CMLMICRO [ CML MICROCIRCUITS ]
